Seasonal variation of infestation rate with lice, tick and mite among rodents in certain Egyptian regions

Four species of mites [Ornithonyssus bacoti, Haemolaelaps glusgowi, Echinolaelaps echinolelaps and Dermanyssus gallinae], two species of ticks [Rhipicephalus sanguineus and Hyalomma dromedarrii] and one species of lice [Polyplax spinulose] were identified on rodents during 4 successive seasons [2005] trapped in five governorates [Suez, Menoufia, Giza, Damietta and Beni-Sewaf]. The rodents were Rattus norvegicus, Rattus rattus alexandrinus, Rattus rattus frugivourus, Acomys cahirinus and Mus musculus Rodents in Suez were the highly ecto-parasites infested ones

Rodents as reservoir host of intestinal helminthes in different Egyptian agroecosystems

Hymenolepis diminuta were detected in rodents in all zones surveyed Governorates under studied [Suez, Menoufia, Giza, Damietta and Beni-Sewaf]. The highest infestation recorded at Suez and Demiatta Governorates. On the other hand, rodents at Menoufia and Beni-Sewaf showed there is no convincing evidence that they infested with H. diminuta. The existence of one species of nematode namely, Streptopharagus kuntzi were recorded at Suez, Giza and Demiatta Governorates only. While Menoufia and Beni-Sewaf Governorates showed no convincing evidence that, they infested with nematode. Worms were recovered from Norway rats. Data indicated that Rattus norvegicus were the most vulnerable species at infection with H. diminuta and Streptopharagus kuntzi. Summer is highly infested with nematode in comparison with other seasonal study

Susceptibility of culex pipiens complex to some insecticides in Qatar

Insecticides susceptibility tests were conducted on Culex pipiens larvae from both Doha and Al-Rayan. The insecticides used were chloropyrifos, propetamphos [Organophosphorous], cyphenothrin, cyfluthrin [Synthetic] and etofenprox. Larvae in Al-Rayan district were more susceptible to all insecticides than in Doha. The chlorophyrifos and cyfluthrin were the most effective larvicides, cyphenothrin was moderate and propetamphos and etofanprox were the least ones

Dipterous flies species and their densities in fourteen Egyptian governorates

The present study focused on dipterous flies distribution and densities in 14 Egyptian governorates. The abundance and distribution of flies was carried out in three phases. The first was in 1999 in 5 governorates [Qalyoubia, Monoufia, Fayoum, Behaira and Assiut] including species of the families: Calliphoridae, Chloropidae, Drosophilidae, Milichiidae, Muscidae, Otitidae, Piophilidae, Sarcophagidae, Sepsidae, Sphaeroceridae and Syrphidae. The second was in 2000 in another five governorates [Kafr-El-Sheikh, Giza, Menia, Aswan and Sharqia] including. of the families: Calliphoridae, Chloropidae, Drosophilidae, Milichiidae, Muscidae, Otitidae, Piophilidae, Sarcophagidae, Sepsidae, Sphaeroceridae and Syrphidae. The third phase was in 2001 in 4 governorates [Qena, El-Wady El-Gedied, Daqahlia and South Sinai] including species of the families: Calliphoridae, Chloropidae, Drosophilidae, Milichiidae, Muscidae, Otitidae, Phoridae, Piophilidae, Sarcophagidae, Sepsidae, Sphaeroceridae and Syrphidae. Musca domestica was the most abundant sp. found throughout the work. The results are a step in drawing an update map for insect-vectors to help in the national controls programs

Merogony of toxoplasma gondii [apicomplexa: coccidia] and its effect on the mortality and histopathology in the house mouse musculus

The merogonic stages of Toxoplasma gondii and their effects on the mortality and histopathological changes in the orally-inoculated male house mice Mus musculus with low and high doses [LD and HD] of T. gondii sporulated oocysts were investigated. The mortality percentages in LD group were 16%, 20%, 28% and 72%; while, those in HD group was 36%, 56%, 72% and 100% in the 1st-4th week, respectively. Meanwhile, the maximum mortality percentage of the control group reached 6%. The histopathological changes induced by the parasite in different organs, such as kidney, liver, brain, spleen, heart, lungs and testes were discussed

Mosquito species and their densities in some Egyptian governorates

The present work studied the mosquito's identification, distribution and densities in 14 Egyptian governorates. The abundance and distribution of mosquito species were monitored by three phases: The first was carried out in 1999 in Qalyoubia, Monoufia, Behaira, Fayoum and Assiut; the second was in the year 2000 in Kafr El-Sheikh, Giza, Sharqia, Menia and Aswan and the third was in the year 2001 in Qena, El-Wady El-Gadeed, Daqahlia and South Sinai. Culex species were the commonest, mainly C. Pipiens, C. antennatus and C. univittatus. C. theileri was found only in El-Kharga Oasis. Culiseta sp. was found in Qalyoubia, Monoufia, Behaira, Fayoum, El-Wady El-Gadeed, Daqahlia and South Sinai and as larvae in Kafr El-Sheikh, Giza and Menia. Aedes detritus was found in Assiut, Fayoum, Giza, Aswan, El-Wady El-Gadeed and South Sinai. Ae. Caspius was found in Assiut and Aswan and as larvae in Qena and El-Wady El-Gadeed. Anopheles pharoensis was found in Behaira and Fayoum; while, A. algeriensis was found in Aswan. A. multicolor and A. Sergentii were found in Fayoum, Aswan and El-Wady El-Gadeed; but in Qena, A. Sergentii was found as larvae and A. multicolor as adults

Field studies on the susceptibility of housefly to certain insecticides in nine Egyptian governorates

Standard WHO test methods were used to determine the susceptibility of field population of housefly to four organophosphorus and two pyrethroid insecticides. Field population flies were collected from nine governorates [Giza, Fayoum, Suez, Behaira, Monoufia, Sharqia, Kafr El-Sheikh, Assiut and Aswan]. The results indicated that all tested insecticides were very effective on flies collected from Sharqia, Kafr El-Sheikh and Aswan, but there was an increased vigor tolerance among those collected from Kafr El-Sheikh for bioresmethrin and tolerance for diazinon in Aswan. In Assiut, flies exhibited a high sensitivity to diazinon, deltamethrin and bromophos, while malathion was the least effective adulticide. A resistance to malathion, diazinon, fenthion and bioresmethrin was noticed in varying degrees at all governorates. The highest average resistance ratio was recorded for malathion in Behaira [55.3 folds] and in Suez [26 folds]. Resistance was also more pronounced in Monoufia for diazinon [23.3 folds]. As for bioresmethrin, an apparent increase in the resistance ratio was detected in Suez [25 folds]. In Giza, the houseflies were resistant to fenthion [14.5 folds]. Regarding the difference between the six insecticides used, deltamethrin was the most potent one in all governorates

Some field and laboratory studies on rattus Rattus subspecies and rattus norvegicus in two Egyptian governorates of different ecological characters

Both Damietta and Qalyoubia governorates were examined for the seasonal activities of Rattus species and subspecies and their natural infection with Trypanosoma lewisi. The common domestic rodents identified were Rattus r. alexandrinus, R. r. frugivorus and Rattus norvegicus. They were common all the year round except in winter for R. norvegicus in Damietta. Gravid females of the three rodent species were identified in Damietta in summer, in addition to autumn for R. norvegicus only. In Qalyoubia, gravid females of the three rodent species were identified in spring, in addition to autumn for R. norvegicus only. The heaviest rodent in weight was R. norvegicus in summer [Damietta] and in spring [Qalyoubia]. The three rodent species were naturally infected with T. lewisi